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System and method for reducing display artifacts

  • US 10,394,391 B2
  • Filed: 06/30/2015
  • Issued: 08/27/2019
  • Est. Priority Date: 01/05/2015
  • Status: Active Grant
First Claim
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1. A processing system for an integrated display device and capacitive sensing device, comprising:

  • driver circuitry configured for coupling to a plurality of source lines and a plurality of sensor electrodes, each of the plurality of sensor electrodes comprising at least one common electrode configured for display updating and capacitive sensing; and

    a driver module coupled to the driver circuitry and configured to;

    drive the plurality of sensor electrodes for capacitive sensing during a first non-display update period that occurs between first and second display line update periods of a display frame, and during a second non-display update period that occurs between the second and a third display line update periods of the display frame, where each of the first and the second non-display update periods is at least as long as one of the first, second, and third display line update periods;

    hold a first source line of the plurality of source lines at a first source voltage during a full length of the first non-display update period;

    hold a second source line of the plurality of source lines at a second source voltage during the full length of the first non-display update period;

    hold the first source line at a third source voltage during a full length of the second non-display update period; and

    hold the second source line at a fourth source voltage during the full length of the second non-display update period, wherein each of the first source voltage, the second source voltage, the third source voltage and the fourth source voltage are different.

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